Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-47612

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: nfc: fix segfault in nfc_genl_dump_devices_done When kmalloc in nfc_genl_dump_devices() fails then nfc_genl_dump_devices_done()…

Published Jun 19, 2024CWE-476EPSS 0.22%

Overview

CVE-2021-47612 is a medium-severity vulnerability. It was published on June 19, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

nfc: fix segfault in nfc_genl_dump_devices_done

When kmalloc in nfc_genl_dump_devices() fails then

nfc_genl_dump_devices_done() segfaults as below

KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]

CPU: 0 PID: 25 Comm: kworker/0:1 Not tainted 5.16.0-rc4-01180-g2a987e65025e-dirty #5

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-6.fc35 04/01/2014

Workqueue: events netlink_sock_destruct_work

RIP: 0010:klist_iter_exit+0x26/0x80

Call Trace:

<TASK>

class_dev_iter_exit+0x15/0x20

nfc_genl_dump_devices_done+0x3b/0x50

genl_lock_done+0x84/0xd0

netlink_sock_destruct+0x8f/0x270

__sk_destruct+0x64/0x3b0

sk_destruct+0xa8/0xd0

__sk_free+0x2e8/0x3d0

sk_free+0x51/0x90

netlink_sock_destruct_work+0x1c/0x20

process_one_work+0x411/0x710

worker_thread+0x6fd/0xa80

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/214af18abbe39db05beb305b2d11e87d09a6529cRefgit.kernel.org/stable/c/2a8845b9603c545fddd17862282dc4c4ce0971e3Refgit.kernel.org/stable/c/6644989642844de830f9b072cd65c553cb55946cRefgit.kernel.org/stable/c/c602863ad28ec86794cb4ab4edea5324f555f181Refgit.kernel.org/stable/c/d731ecc6f2eaec68f4ad1542283bbc7d07bd0112Refgit.kernel.org/stable/c/d89e4211b51752daf063d638af50abed2fd5f96dRefgit.kernel.org/stable/c/ea55b3797878752aa076b118afb727dcf79cac34Refgit.kernel.org/stable/c/fd79a0cbf0b2e34bcc45b13acf962e2032a82203Refgit.kernel.org/stable/c/214af18abbe39db05beb305b2d11e87d09a6529cRefgit.kernel.org/stable/c/2a8845b9603c545fddd17862282dc4c4ce0971e3

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47612?

CVE-2021-47612 is a medium-severity vulnerability. It was published on June 19, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47612?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47612?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47612?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47612 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999